adding a play 1, do I need a bridge?

I've had Sonos from the beginning. It's a small system, only 2 ZP's (ZP100's), one is wired to my network. I even have one of the original controllers. Use my Ipod's mostly for control.

So, I want to add a few Play 1's in my kids rooms. With the setup I have do I need a bridge? I have gift cards to Best Buy and want to buy them there but I don't think they include a bridge with the play 1's like Sonos does if you buy on the website.

Thanks.

Roveer